Cutting and welding torch



May 15, 1923. L

T. A. ERBE-VT ET AL CUTTING AND wELDrNG TORCH 2 Sheds-Sheet l Filed Oct.2l l192].

EMO/MHS M l mm EOE Rf. FB HMM un L May 15, 1923.

T. A. ERRETT ET AL CUTTING AND WELDING TORCH Filed Oct. 2l 1921 2Sheets-Sheet 2 f Patented Mey' 15, 1923.

' To all 'whom 'it may concern:

l' uNi'rlezDA STATES PAT.Fi-N11V formes.;

moins-A. mmm, wILLIAm I. lmaowN, Nn nnen r. BROWN, or'sANframcisoo, vc.n. rrornura r CUTTING AND WELDING TORCH.

Appumtnmy med october a1, 192i. semi N6.. 509,295.,

Be it known that we, THOMAS ERRFJi-r,

'WILLIAM P. BROWN, and HUGH F. BnowN,

citizens of the United States, and residents of San Francisco,California, have invented certainnew andv useful Improvements invCutting and Weldin Torches, of which the l following is a spec' cation.l This invention relates to lmprovements iii welding torches, and morearticularly to torches of that character whlch utilize oxygen andacetylenegases, to produce a welding, or cutting ame. The principalobject of the present invention 'is to provide a welding torch oftheabove character em- `bodying `improvements of construction, whereby,shouldv explosionsv take place due to a dash back within themixingchambers of the torch, the'force of such explosion,

which would normally tend toblow in wardly and drive the flame to thegas supvly tubes, is so overcome and resisted that its force is expendedto drive the ame out--A wardly.

Other objects of the invention reside in the details of construction,and in the com- .bination of parts hereinafter described.

In accomplishing these and other objects of the invention, we haveprovided the improved details of construction, the pre-A ferred forms-ofwhich lare illustrated in the accompanying drawings, wherein- Fig. 1 isa longitudinal, sectional view, of a torch constructedin accordancewiththe present invention; the viewjbeing taken onl the line 1--1 inFig. 2.

l/Fig 2 is a longitudinal section `of the i torch, taken on the line 2-2in Fig. 1.

` vention.

Fig. 3 is an enlarged, transverse section, taken on the line 3--3 inFig. 1.

Fig. 4' is a transverse sectional view on Fi 5 is a longitudinal sectionof a torch of a modified construction but also embodying the principalfeature of the present in- F ig. 6 is a transverse section, taken on theline 6-6 in Fig. 5. Referring more in detail to the several views of thedrawings, wherein like reference numerals designate the same or likearts]- f 1 designates the handleend of the torch casin wherein isembodied :a passageway for tl:

vtop of the head and hasa cap '16 thereon e pipes through which thedifferent parts of different diameters, 4and contains two outwardlyfacing annular vseats 3 land 4. A lateral flange -fornied integral withthe head serves as a connecting meals for the respective pipes 6,' 7and, 8 which are threaded in to the iange in registration respectivelywith channels 9, 10 and 11 whichcommunicate with the internal chamber of v i the head. Y

Inserted within the head is an elongated lug 12, provided with annularshoulders. 13 and 14 which are adapted toseat againstI the seats 3 and4, and also having a4` threadf ed endl portion l5 which extends Afromthewherebyv the plug shouldersv are drawn tightly against the seats topreclude leakwithin the chamber,` and e intermediate this?l lower endandthe shoulderf1'4, also between the shouldersl and 14 Aand above-theupcation respectively with the' pipes 6,-7 andA 8 through the channels9, 10 and 11.

Disposed `in abutting contact with the lower end of the plug 12 is atip20,.con' sistingof a nozzle like member with a projecting annular ange21 about itsupper end. A union coupling 22, which enclosesy the iangedend of the tip, is threaded onto the lower/end of the head 2 'to securethe tip functionally in position. The tipl shown is provided, with acentral extension, on its inner end, that is seated within a socketprovided in the lower end of the plug, and an annular channel 24 isformed about this extension between the tip and plug from lwhich aplurality of outlet chanper shoulder, it isv reduced in' diameter' sow-'that three4 separate f annular chambersl'?, 18 and 19 are formed whichhave communi the plug to provide communication between the chamber 19and channels 28. l

The inner ends of the pipes 6, 7 and 8 are mounted within a valvecast-ingy 35 which, in turn, has a neck portion 36 threaded into theouter end of a cored out chamber 37 in a casting 38 mounted within theouter end of the handle member 1.' The chamber 37 has twoannularoutwardly facing seats 39 and 40 formed therein and a plug 41 is mountedwithin a bore in the neck portion of the member 35 and the chamber 37which has shoulders formed thereon toengage the saidseats'39 and 40 sothat there is provided an annular chamber 44 about the plug and aseparate pocket 45 at the base of the chamber, into which the inner endofthe plug extends.

too

At the inner end of the handle member 1 is a casting 50, provided withtwo channeled stems 51 and 52 which are adapted to be connectedrespectively with conduits, not shown, leading from a supply of oxygengas and acetylene gas under pressure. Pipes 53 and 54 lead from'thesechannels within the handle 1 to the end of the casting 38 where they areconnected with channels 55 and 56 within the latter and which leadrespectively into the pocket 45 and chamber 41. A valve 57 is located inthe'channel 52 and a valve 58- is placed in the channel 55 whereby theow of ases is controlled. A channel 59 is formed 1n the plug 41, seeFig. 2, which opens at one end into the chamber 44 and at its opposite'end registers with a channel 59 in the casting 35 which leads into thepipe- 8.

Une of the features of the resides in the construction o the plug 44,which is of such length that it does not reach to the base of the pocket45. There is a channel 60 transversely through this inner end of theplug and a channel longitudinally of the plug which, at one end, opensinto the channel 60 and at its opposite end into a channel 62 whichleads into a valve chamber 63 in the casting 35,. A passage 64 leadsfrom the chamber 63 into the pipe 7 anda passage 65 providescommunication between the pipe 6 and avalve stem channel 66 which opensinto the chamber 63. The channel 66 is normally closed by means of aspring pressed valve 68 having a stem 69 extending from the top of thecasting which may be depressed by means of a hand lever 70 mounted onthe casting to move the valve n position, and there is a valve 71 locatein the channel 64 whereby flow-into pipe 7 is controlled.l l

Assuming the device to be' so constructed, it will `be seen that theacetylene gas which is admitted'to the torch through the 'channel 52 inthe casting 50, after passing the valve 57, flows through pipe 54,channel 56, into chamber 44, then through channels 59 and Y, oxygen forweldin present devicey Maase@ 59', pipe 8, channel 11, ito chamber 19,then through porgs 30, channels 28 into chamber 24 and is dischargedfrom the tip through the channels 25. The oxygen gas which is admittedto the torch through the 2"Io channel 51, passes through pipe 53,channel 55 into pocket 45, then through channels 60, 61 and .62 intochamber 63. Low

may be` admitted by* manipulation of va ve 71 through channel 64, pipe7, channel 10, chamber 18, channels 2t into chamber 24 where it'mixeswith the acetylene gas and is/ dischar ed therewith through the channels25. igh pressure oxygen for cutting is admitted as is desired upon theoperation of the valve 68, into channel 66'y passing through channel 65into pipe 6 through channel 9, chamber 17, ports 27 and is dischargedfrom the tip through the channels 26 and 26.

The torch construction that we have'illustrated in Figs. 5 and 6 is'similar to that in` the previous figures'in so far as Vthe handle endof the device is concerned, but this head end is equipped with a cuttingtip 7 5I which is connected by means of a curved pipe 76 with a tubularshank 77 which is mounted in the same manner and conforms somewhat inconstruction at its mounting end to the plug 41 in the other type. Thetubular member 77 has an enlarged interior explosion chamber 78 whichcommunicates, at one end, with the tip and, at its op-posite end, withthe pocket 45 by means of channels 60 and 61 formed as previouslydescribed. Channels 79 also lead from the chamber 78 into the chamber 44so that the mixture of gases takes place within the chamber 78. f A

In the use of such torches, flash back explosions are frequent, andunless provision is made to prevent a flash back iame from followingback through the torch to the gas supply pipes, much damage can becaused thereby. The present construction has overcome the possibility ofsuch damage by the construction of the plug 41 and the disposition ofthe channels 60 and 61 therein. It will be noted that, since there is nodirect passage of the oxygen gas through the pocket 25 an explosiontaking pla-ce in either of the pipes 6 or 7 would have less resistanceoutwardly than inwardly and consequently its force would be expendedoutwardly.

We claim- In a torch of the character described, a handle member havinga casting at one end thereof providedwith an outer end socket; saidsocket having shoulders formed intelriorly thereof and terminating atits inner end ina pocket, and channels in said casting, through whichgas may be directed, opening into'the base of said pocket and into thesocket .between said shoulders, a torch member threaded into said sockethaving a bore in the end thereof and having 1,454,996 l A s channelsleading from the base of said bore plug having longitudinal channelstherein through which gas can be directed to'the openin into thechannels of the torch memtorch tip, and a plug having one end fitted beran at their opposite ends into the an within said bore and its o positeend exnular chamberabout the plugand the trans- 5 tended iinto saidsocket an rovided with verse channel at the end thereof. ll

shoulders engageable'vvith sai socket shoul Signed at San Francisco,Cal., this v7th ders forming an annular chamber about the day of October1921. plug, and having a reduced end extending p zIHOMAS A. ERRETT. intosaid pocket; said reduced end having a WILLIAM P. BROWN.

l0 transverse channel therethrough, and said HUGH F. BROWN.

